Yes I have been taking for the last 4 months. The truth is I'm not sure what is happening with me taking the the Advanced Amino. Quick back ground, I'm 59 very healthy after a year of quit drinking, eating only healthy foods not process foods outside of the store middle isles, I lost 18 lbs. now way 152 with little change in weight up or down. work out at home 5 day a week for 1 hour, hike when I can, I would like to add muscle weight but having a hard time I have definition and strength, So is it helping me? Not sure? Insight would be great. Thanks Donald Lambert